JPS63172563A - Original reader - Google Patents

Abstract

PURPOSE:To read various and diversified documents quickly without soiling the documents by allowing an original read means to move a position reading an original freely and carrying the original to a position read by the original read means automatically. CONSTITUTION:The original read means 1 capable of moving a position at least to read the original freely and an automatic original feed means 3 carrying the original to a position where the original is read by the original read means 1 are provided. In reading the original while the original is at standstill, the original read means 1 is moved to a position where the original is to be read and in reading the original in the carrying state, the original read means 1 is close to the moving original to attain continuous original reading. Thus, various and diversified documents are read continuously quickly without soiling them.

Description

[Detailed Description of the Invention] [Objective of the Invention 1 (Industrial Application Field) The present invention relates to a document reading device, and in particular, it is capable of reading a document one side at a time and also automatically and continuously with one device. It is sent to the original reading device.

(Prior Art) A conventional document reading device has a transparent plate-like body, such as a platen glass made of a glass plate, on the top surface of a box-shaped main body, and can be moved forward and backward in close proximity to the bottom surface of the platen glass. An optical reading unit configured as shown in FIG.
J manuscript cover is completed.

Therefore, in the conventional document reading device described above, when reading a document, the document is manually placed face down on the top surface of the platen glass, and then the document reading device is activated and the optical reading unit is moved to the left. less common in the direction
By relocation@saU 1. The above manuscript had to be read one page at a time.

Furthermore, especially in document management systems that file ceiling-suspended documents within the system and perform document management such as searching,
It is always necessary to input a large number of documents into the system, and it is extremely inefficient to read each page of the document one by one and import it into the system. There were concerns that the contents of the files that were created would become obsolete.

Furthermore, as a Vtn that automatically feeds single-sheet originals, an automatic document feeder adopted in electronic copying machines, for example, is known. The document is conveyed one by one onto the platen glass of the electronic copying machine, and when the document reaches a predetermined position on the platen glass, the conveyance is temporarily interrupted, the document is kept stationary, and the optical reading unit is brought close to the document. When the copying of this original is completed, the original is further conveyed, the original is ejected from the platen glass, and the next original is conveyed. It was something I did.

(Problem to be Solved by the Invention) However, since the original is conveyed with the original surface always in contact with the platen glass, depending on the condition of the original, paper quality, or atmosphere, problems may occur between the original and the above-mentioned conveying means. When the so-called "sniping edge J" stops the document, it may cause positional abrasion of the document from the predetermined position n, or it may stain the platen glass or the document due to friction during the forward movement.
Furthermore, there has been no document reading device equipped with a device that can automatically feed documents.

The present invention has been made in view of the above, and has the object of being able to read profane documents quickly and continuously without smearing them, and for example, reading bound documents. The objective is to provide a document reading device that can.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention optically reads a document, converts the contents of the read document into an electrical signal, and transmits the converted signal to the outside. The output device includes a document reading device configured to be able to move forward and backward at least to a position where the document can be picked up, and an automatic document feeder that automatically transports the document to a position where it can be read by the raw stone reading device. The paper means is also provided.

(Function) In the document reading device according to J3 of the present invention, when reading a document in a stationary state, the document reading means is moved to a position where the document can be read and the reading is performed,
Furthermore, when reading a document that is being transported, the document reading means is placed close to the moving document and the document is read (31!). Since reading can be carried out continuously, reading can be performed as appropriate depending on the state of the document using one document reading means.

(Example) Hereinafter, one embodiment of the present invention will be explained in detail using the drawings.

As shown in the perspective view of the entire external arrangement of the document reading device 1 of this embodiment, the document reading device r? A document cover 7 is provided on the upper side of the box-like Vtδ housing 10 constituting the main body, and the document cover 7 is pivoted at the rear so that the front side (lower right side in FIG. 2) can be opened and closed up and down. Left side (lower left side)
An automatic document feeder 3 is mounted on the holder, and an operator panel 9 is arranged on the upper surface of the front edge.

Note that this operator panel 9 is used for A D + = DI for instructing the operation of the automatic document feeder 3 and for reading primary keys.
The document direction key changes the reading wetness according to the clarity of the document's shading, the document direction key sets the document size according to the size of the document, the document direction key instructs the direction of the document when scanning the document, and the document direction key changes the document direction depending on the content of the document. Character mode (8PP
I), fine mode (16PPI), η true mode (16P
The setting contents and each operation status set by the above operation keys can be changed by the blinking of the E D lamp or by the LCD. It consists of a display section that displays characters and figures using

Next, the overall configuration of the document reading device 1 will be schematically explained using the side cross-sectional view of FIG. 1.

The top plate of the device housing 10 has a rectangular opening 1 which is slightly larger than the size of the document desired to be read.
A first platen glass 11 is formed by inserting a transparent glass plate into the portion thereof, and the first platen glass is attached to the first platen glass in a strip shape adjacent to the left side of the lath 11 (the upper left side in FIG. 1, the same applies hereinafter). 2nd platen glass formed in the same manner as 11"
13. At this time, the first platen glass 11
and the second platen glass 13 (in the thickness direction in FIG. 1) are formed equally.

Further, in this embodiment, the first platen glass and the second platen glass are configured separately in J3, but it is also possible to configure them integrally. This integration of the platen glass reduces the number of work steps during assembly, increasing productivity, and also facilitates maintenance and cleaning.

Furthermore, an optical reading unit 5 is configured inside the device housing 10 and moves from the right end of the first platen glass 11 to the left end of the second platen glass 13 in close proximity to the lower surfaces of these platen glasses. do. The optical reading unit 5 mainly consists of a light source that irradiates light onto the document surface and a light receiving element that receives light from the document surface. In this embodiment, a fluorescent lamp 51 that uniformly illuminates the document with sufficient illuminance is used as a light source, and a dense D-type image sensor module 53, which is formed to be the same width as the document width or longer than the document width and has a deep depth of field, is used as the light receiving element, and the analog signal of this image sensor module 53 is It is equipped with an A/D converter 55 that converts into a digital signal, and is configured to be movable in the left and right directions (left and right directions in FIG. 1) by a pulse motor PMI that is driven under the control of the control section 2, which will be described later. .

The document cover 7 is large enough to cover the first platen glass 11 described above, and its top side is sloped so that one side facing the automatic document feeder 23 is lower, and this - side is lower. A stacker 73 having a substantially plate-like shape with rising portions formed on three sides except for the stacker 73 is formed to receive the originals fed from the automatic original document feeder 3 and stack them one by one. Also, the above document cover 7
The bottom side is a flat platen sheet that presses and fixes the original uniformly and is colored white to increase the contrast ratio of the original, for example when the original is rough and translucent. 71 is installed.

Next, the automatic document feeder 3 will be explained.

The automatic document feeder 3 is housed in a device housing 1 as shown in FIG.
It is a box body placed on the upper left side of 0 and having a depth longer than the document width, and a document feed table 31 on which stacked documents are placed protrudes from the upper left end.

The transport 11 structure of this automatic document feeder [3] is housed inside the box, and the document placed on the document feed table 31 is driven by a pulse motor PM2 according to i control of the control section 2, which will be described later.
The documents are sequentially conveyed by a clutch mechanism or the like, and after the document reading is completed, they are discharged onto the stacker 73 on the top surface of the document cover 7.

The conveyor groove of the automatic document feeder 3 will be described below with reference to FIG.

The feed roller R1 is disposed on the lower surface of the document feed tray 31, and the roller surface is slightly exposed from the opening of the document feed tray 31, and the document stacked on the raw stone feed tray 31 is fed from the bottom side. The documents are sequentially sent into the automatic document feeder 3.

Min@[:1-ra R2 and the take-in roller R3, which is disposed in contact with and facing the separation roller R2, take in documents one by one into the automatic document feeder 3, and the separation roller R2 rotates in a direction opposite to the direction in which the original is conveyed to separate the original.

゛The conveying roller R5 and the ejecting roller R9 are a pair of rollers disposed facing each other in contact with each other, and they transport the original, and also transport the document, and the platen roller R7 located between the conveying roller R5 and the ejecting roller R9. Wrap the manuscript around the surface.

The platen roller R7 is a cylindrical body made of resin and rotatably supported, and the surface of this cylindrical body is white like the platen seat 1-71 stretched over the large surface of the original document cover 7. For example, it is possible to read a document with a high contrast ratio even if the document is thin and tends to be unclear. Further, if necessary, in order to reduce the load on each document during conveyance, the platen roller R7 may be rotated to match the document conveyance speed of the conveyance roller R5 and the discharge roller R9.

Further, the platen roller R7 is disposed with a gap of, for example, 0.5IllIIIV1 degree from the surface of the platen glass 13. In other words, this gap prevents dirt from adhering to the surface of the platen glass 13 and damage to the document surface due to the surface of the platen glass 13 being touched by the surface of the document f71. The distance is set to a value that falls within the depth of field to the right of the optical reading unit 5. That is, the deep coverage S1' degree of the optical reading unit 5 causes a difference in focal length from when reading a stationary document caused by a gap of about 5 mm between the platen roller R7 and the platen glass 13, and In order to absorb the variation in focal length caused by the difference in paper thickness, for example, the thickness of the second platen glass 13 is made 0°5 m59 thicker than that of the first platen glass.
There is no need to provide adjustment means for adjusting the focal length or the like to change the axial position of the platen roller R7 according to the paper thickness of the document.

In this embodiment, for example, 5 to 10 CI is used to convey the document.
A plurality of resin rollers and metal rollers with a low left engraved thereon having an arbitrary length of Q are used for conveyance in appropriate combinations. You may also use existing sponge rollers.

Next, a document position detection sensor provided in the automatic document feeder 3 will be explained.

A document presence/absence detection lens L1 is disposed between the feed roller R1 and the take-in roller R3, and is activated when a document is placed on the document feed tray 31 to detect the presence or absence of the document.

A document trailing edge detection sensor L2 is disposed between the take-in roller R3 and the transport roller R5, and detects the passage of the document and the passage of the trailing edge of the document.

A document leading edge detection sensor L3 is disposed between the conveyance roller R5 and the platen roller R7, and detects when the leading edge of the document passes and enters the reading state.

A document discharge detection hinge is provided between the platen roller R7 and the discharge roller R9 to detect the start and end of document discharge.

FIG. 4 shows a block diagram illustrating the operating state of the document reading device 1973 incorporated in the expenditure management system.

In FIG. 4, the control unit 2 includes a microcomputer, and controls two pulse motors PMI, PM2, crutch mechanism OL, etc. according to instructions input using the operator panel 9 and instructions from the host computer input via the host interface 21. It controls the operation of the mechanical parts of the optical reading unit 5, performs various processing such as image processing based on the digital signal received from the optical reading unit 5, and further transmits data to the host computer via the host interface 21. It is.

Further, at this time, the priority order of instructions from the operator panel 9 and the host computer is determined as appropriate.

Below is the tree nut/l! The effect of the example will be briefly explained based on the operating procedure.

The operation of the IIIwJ unit 2 is determined 8 in accordance with instructions from the operator panel 9 or the host computer's document feeder or the automatic document feeder 3.

For example, when reading a document placed on the platen glass 11, the pulse motor PM1 is continuously driven to move the optical reading unit 5 continuously at a constant speed over the bottom surface of the document. and read the manuscript one by one.
When the automatic document feeder 3 is used to continuously read documents stacked on the document feed table 31, the pulse smoke PMI is driven to move the optical reading unit 5 to a predetermined position below the platen glass 13. Then, by appropriately driving the pulse motor PM2 and the clutch CL, the documents are conveyed one by one, and when the rough stone is wound around the platen roller R7, the optical reading unit 5
The moving document is sequentially and continuously read using the .

Furthermore, in the present embodiment, the original placed on the original document feed table 31 is temporarily stopped at the original separating section and is on standby, but it may be made to be on standby just before the platen roller R7. In this case, the document can be read immediately after receiving the instruction to start reading.

Further, in this embodiment, the automatic document feeder is fixed to the device housing, but it may be configured to be detachable as required, so that it is attached only when reading documents continuously.

By implementing this embodiment, it is possible to select the method of reading the original depending on the shape of the original. For example, in the case of a single-sheet original that can be automatically fed, stacked single-sheet originals can be transferred to the automatic document feeding mechanism. Just place the original on the original placing surface with the original side facing down and drive the original 71 continuous reading mechanism to automatically read the second original.
Using the optical reading unit moved to the bottom surface of the platen glass, the content of the above document can be automatically and continuously read, and the document after the document content has been read is automatically and continuously read. It can be ejected from the reading 0i premises and then set to V:1 again in the same manner as in the above-mentioned placement state.

[Effect of fe brightness] As explained above, according to the present invention, the document reading means can move forward and backward at least to a position where the document can be read, and the document can be moved to a position where the document reading means can read the document. Therefore, when reading a document with a shape that is difficult to feed automatically, the document reading means is moved to read the document. When reading a large number of documents consisting of documents, it is possible to continuously transport and read the manuscript one page at a time, so that the reading of various expenses can be done quickly without contaminating the document. be effective.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side cross-sectional view showing the overall general configuration, FIG. 2 is a perspective view showing the external appearance, and FIG. 3 is a conveyance mechanism of an automatic document feeder. Configuration diagram, 4th
The figure is a block diagram explaining the operating state. 1... Original reading device 3... Automatic document feeding device 5... Optical reading unit

Claims (3)

[Claims] (1) A device that optically reads a document, converts the contents of the read document into an electrical signal, and outputs it to the outside, and is configured to be able to move forward and backward at least to a position where the document can be read. A document reading device comprising: a reading device; and an automatic document feeding device that automatically transports a document to a position where it can be read by the document reading device. (2) When the document reading device reads the document being moved by the automatic document feeding device, the document reading device moves to a position below the automatic document feeding device where a predetermined document can be read. A document reading device according to claim 1. (3) The automatic document feeding means is configured to be detachably attached to the main body of the document reading device.
The document reading device described in section.